Diving into vintage audio for the first (real) time, suggestions wanted.

Yeeterkeeter

Yeeterkeeter

Kermit the Frog
Hello everyone, I just purchased a Kenwood KR-7400 stereo from a seller on reverb, with no issues listed, and cosmetically it looks like it's in good condition. That being said, this is the first time I have owned a vintage receiver, so any suggestions regarding maintenance, cleaning, and diagnosing are highly appreciated. Thanks!
 
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If you buy vintage....

1. Buy it restored.

2. Restore it yourself.

3. Wait until something goes wrong and. then do step 1 or 2.

If you're not willing to do one of those 3, I always suggest buying new.

I see you've already purchased a nice Kenwood. There's something special about using a unit that's working that's been around for decades.
 
Yeeterkeeter said:
...any suggestions regarding maintenance, cleaning, and diagnosing are highly appreciated. Thanks!
Click to expand...

For cleaning, this is a go to thread/sticky.

Arkay

Thread 'The Idiot's Guide to Using DeOxit (revisited)'

Moderator’s note: we have an updated and condensed version of the following here: https://audiokarma.org/forums/index.php?threads/tldr-deoxit-guide.850968/

I was asked to re-post this semi-ancient post that has been long buried in the archives and I was reluctant to re-post anything already in the archives, but I decided that with just a bit of modification it may help some of the many newbies here who ask periodically about DeOxit and how to use it. With just a few minor changes from the original, here is re-presented...

INTRODUCTION:

You...
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You mentioned it was listed as having "no issues" what is it you're trying/wanting to diagnose?
 
Dswankey said:
You mentioned it was listed as having "no issues" what is it you're trying/wanting to diagnose?
Click to expand...
I want to do preventative maintenance, like cleaning out dust, replacing bulged capacitors, etc. I don't forsee myself having to do much of that, but its always helpful to get a hang of it.
 
As Jimi said, 'are you experienced?' Unless you are pretty good with a soldering iron and understand amplifier theory and design at least a little bit, you stand a good chance of getting lost, or actually damaging things. If your intention is to use and enjoy a vintage receiver, since the Kenwood is working, why not just listen to it? On the other hand, if you want to learn how to work on vintage equipment, here is your opportunity, though I suspect you could find something needing TLC that might be really cheap and therefore more regret free if you bollix it up.
 
"If it ain't broke, don't fix it."

You will be tempted, and like us all you will eventually succumb to the urge, but if your equipment works then don't go out of your way to start tearing it apart just yet. Enjoy it, use it, the next thing will be along shortly I assure you.
 
At the minimum, when I get a vintage amplifier, before I connect my speakers, I check for DC at the speaker terminals. If there is much over 50mV of DC I don't use it as is. If it passes this test I look for even heating of the heat sinks where the output devices mount. This can determine the basic health of the unit. It's safer than hooking it up to nice speakers.
 
It just came in last night, everything is in good working condition and barely produces any heat even with a component on top of it. The volume knob has an issue where over a tiny span of space it jumps from being too quiet to quite loud, but I think that issue can be fixed with some rubbing alcohol. Overall, I am extremely happy with it, and it looks terrific. Other than the volume knob, everything works perfect.
 
Yeeterkeeter said:
It just came in last night, everything is in good working condition and barely produces any heat even with a component on top of it. The volume knob has an issue where over a tiny span of space it jumps from being too quiet to quite loud, but I think that issue can be fixed with some rubbing alcohol. Overall, I am extremely happy with it, and it looks terrific. Other than the volume knob, everything works perfect.
Click to expand...
Airflow is the best gift you can give your vintage audio. Not only above, but below and behind. I put much of my gear on those kept vibration rivet and cork pads, not so much for vibration but s nice grippy 3/4" lift.
 
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